Data from the Phase 3 randomized controlled trial demonstrat…

Data from the Phase 3 randomized controlled trial demonstrates that people who received the COVID-19 booster shot show a vaccine efficacy of 95% when compared to those who did not receive a booster.   This statement offers an example for which of the following concepts?

If an echo arrives 130 microseconds after the pulse that pro…

If an echo arrives 130 microseconds after the pulse that produced it was emitted, the reflector should be located at a depth of ________ cm. If a second pulse was emitted 13 microseconds before the arrival of this echo, it will be placed incorrectly at a depth of __________ cm.